13.70 For the output stage in Fig. 13.30, find the current IREF that results in a quiescent current IQ = 0.6 mA. Assume that I = 12 µA, QN has eight times the area of Q10, and Q7 has four ...

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13.69 It is required to derive the expression for vE in Eq. (13.89). Toward that end, note from the circuit in Fig. 13.30 that vE = vEB7 + vBEN and note that QN conducts a current iN and Q7 conducts ...

13.68 It is required to derive the expressions in Eqs. (13.87) and (13.88). Toward that end, first find vB7 in terms of vBEN and hence iN. Then find vB6 in terms of iP. For the latter purpose note that Q4 ...

13.67 The output stage in Fig. 13.28 operates at a quiescent current IQ of 0.6 mA. The maximum current iL that the stage can provide in either direction is 12 mA. The output stage is equipped with a feedback circuit ...

13.66 Figure P13.66 shows a circuit suitable for op-amp applications. For all transistors β = 100, VBE = 0.7 V, and ro = ∞.

13.65 The VBE– multiplier circuit shown in Fig. P13.65 can replace the two series diode-connected transistors in Fig. 13.15 to establish the voltage drop needed to bias the output stage transistors. Design the circuit to provide a terminal voltage of ...

13.64 Figure P13.64 shows the CMOS version of the circuit in Fig. P13.63. Find the relationship between I3 and I1 in terms of k1, k2, k3, and k4 of the four transistors, assuming the threshold voltages of all devices to ...

13.63 For the circuit in Fig. P13.63, neglect base currents and use the exponential iC−vBE relationship to show that The figure shows a circuit utilizing n p n and p n p transistors. The n p n transistor Q subscript 2 ...

13.62 An alternative approach to that presented in Example 13.5 for determining the CMRR of the 741 input stage is investigated in this problem. Rather than performing the analysis on the closed loop shown in Fig. 13.27, we observe that ...

13.61 Consider the circuit of Fig. 13.27 modified to include resistors R in series with the emitters of each of Q5 and Q6. Assuming |VA| = 50 V, βp = 50, and IC6 = 20 A, what value of R ...